CN110809225A - Method for automatically calibrating loudspeaker applied to stereo system - Google Patents
Method for automatically calibrating loudspeaker applied to stereo system Download PDFInfo
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- CN110809225A CN110809225A CN201910942481.0A CN201910942481A CN110809225A CN 110809225 A CN110809225 A CN 110809225A CN 201910942481 A CN201910942481 A CN 201910942481A CN 110809225 A CN110809225 A CN 110809225A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
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- Acoustics & Sound (AREA)
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- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Stereophonic System (AREA)
Abstract
The invention relates to the technical field of audio processing, in particular to a method for automatically calibrating a loudspeaker applied to a stereo system. The left sound channel sound box and the right sound channel sound box both play the same sweep frequency signal, the microphone of the left sound channel sound box receives the sweep frequency signal played by the right sound channel sound box, a right sound channel frequency response curve FRR is obtained, the microphone of the right sound channel receives the sweep frequency signal played by the left sound channel sound box, a left sound channel frequency response curve FRL is obtained, one of the left sound channel sound box and the right sound channel sound box transmits the obtained frequency response curve signal to the other, the other party compares the FRL and the FRR, the sensitivity is judged, the difference value a of the sensitivity of the two curves is calculated, the power amplifier gain of the sound box with low sensitivity is increased by a, the sensitivity of the left sound channel sound box and the sensitivity of the right sound channel sound box are kept consistent, each frequency point on the FRL and the FRR is calibrated, and then. The performance of the loudspeakers of the two sound channels is consistent, and a good stereo effect is achieved.
Description
Technical Field
The invention relates to the technical field of audio processing, in particular to a method for automatically calibrating a loudspeaker applied to a stereo system.
Background
At present, with more and more mobile terminal external playing applications, the situation of using stereo external playing gradually appears, that is, one device simultaneously uses two or more external playing sounds or external speakers as external playing devices, and more real sound field experience and external playing effect can be created in the external playing mode.
In order to achieve a good sound reproduction effect, the stereo sound box system requires that the speaker sensitivities of the left and right sound channels are consistent, and in addition, the frequency responses of the left and right sound channels are consistent. However, the sensitivity of the loudspeaker cannot be completely consistent, and only control can be performed within a certain range; and the user hears the sound affected by the placement position of the sound box and the surrounding environment. At present, the common stereo calibration is realized by subjective listening of people, which requires professional listening personnel to practice continuously, and is difficult to realize for common users.
Disclosure of Invention
The invention aims to ensure that the sensitivities and frequency responses of the loudspeakers of the left and right sound channels are consistent and good stereophonic effect is realized by calibrating and correcting the loudspeakers of the two sound boxes of the left and right sound channels.
The technical scheme of the invention is as follows:
a method for automatically calibrating a loudspeaker applied to a stereo system, wherein the stereo system comprises a first sound box and a second sound box, the first sound box and the second sound box are respectively provided with a loudspeaker, a microphone and a communication device, the first sound box is set to be a left sound channel sound box, the second sound box is set to be a right sound channel sound box, and the method comprises the following steps:
s1: the left sound channel sound box and the right sound channel sound box play the same sweep frequency signal;
s2: a microphone of the left sound channel sound box receives a frequency sweeping signal played by the right sound channel sound box to obtain a right sound channel frequency response curve FRR, and a microphone of the right sound channel receives a frequency sweeping signal played by the left sound channel sound box to obtain a left sound channel frequency response curve FRL;
s3: one of the left sound channel sound box and the right sound channel sound box transmits the obtained frequency response curve signal to the other, the other party compares FRL and FRR, the sensitivity is judged, and the absolute value a of the difference of the sensitivities of the two curves is calculated;
s4: increasing the power amplification gain a of the sound box with low sensitivity to ensure that the sensitivities of the left sound channel sound box and the right sound channel sound box are consistent;
s5: calibrating each frequency point on the FRL and the FRR to obtain correction curves of two frequency response curves;
and S6, converting the music played by the left sound channel sound box and the right sound channel sound box into two corresponding music frequency response curves, adding the two music frequency response curves and the correction curve for compensation, and converting the compensated music frequency response curves into music signals to be played in the left sound channel sound box and the right sound channel sound box.
As a preferable technical solution, firstly, the magnitude of the sensitivity at 1kHz is compared, the absolute value of the difference between the sensitivities of FRR and FRL is a, and the case where the sensitivity of FRL is low is described, where a is added to all frequency points of FRL to change the frequency points to FRL + a. And calibrating each frequency point on the FRL + a and the FRR, if the FRR is larger than the FRL + a at a certain frequency point, the corrected value of the FRL + a at the frequency point is FRR-FRL-a, the corrected value of the FRR is 0, if the FRR is smaller than the FRL + a at a certain frequency point, the corrected value of the FRR at the frequency point is FRL + a-FRR, and the corrected value of the FRL + a is 0.
As an optimal technical scheme, the frequency of the frequency sweeping signal is 50-20000 Hz, and the size of the frequency sweeping signal is 0 dB.
As a preferred technical scheme, the left sound channel loudspeaker box and the right sound channel loudspeaker box transmit signals through a wireless connection device, and the wireless connection device adopts a bluetooth transmission device.
As a preferred technical solution, the sweep frequency signal is played by long pressing a key arranged on the sound box or by a remote controller.
As an optimal technical scheme, the frequency sweeping signal is controlled to be played through a mobile phone APP.
The invention also provides a sound box which comprises the stereo system, wherein the stereo system comprises a left sound channel sound box and a right sound channel sound box which are the same in shape and size.
The invention has the beneficial effects that: compared with the prior art, the method for automatically calibrating the loudspeaker applied to the stereo system adopts a mode that the left sound channel loudspeaker box and the right sound channel loudspeaker box which can carry out information interaction through the wireless connection device are mutually calibrated, and the loudspeaker of one loudspeaker box is used as a standard to compensate the loudspeaker of the other loudspeaker box, so that the performance consistency of the loudspeakers of the two sound channels is realized, and a good stereo effect is achieved.
Detailed Description
In order to make the technical means, technical features, objects and technical effects of the invention easy to understand, the invention is further described below.
Example 1:
a method for automatically calibrating a loudspeaker applied to a stereo system, wherein the stereo system comprises a first sound box and a second sound box, the first sound box and the second sound box are respectively provided with a loudspeaker, a microphone and a wireless communication device, the first sound box is set to be a left sound channel sound box, the second sound box is set to be a right sound channel sound box, and the method comprises the following steps:
s1: the method comprises the steps that a left sound channel sound box and a right sound channel sound box both play the same frequency sweeping signals, the frequency of the frequency sweeping signals is 50-20000 Hz, the size of the frequency sweeping signals is 0dB, the left sound channel sound box and the right sound channel sound box transmit signals through a wireless connection device, the wireless connection device adopts a Bluetooth transmission device, and the frequency sweeping signals are played by long pressing of keys arranged on the sound boxes;
s2: a microphone of the left sound channel sound box receives a frequency sweeping signal played by the right sound channel sound box to obtain a right sound channel frequency response curve FRR, and a microphone of the right sound channel receives a frequency sweeping signal played by the left sound channel sound box to obtain a left sound channel frequency response curve FRL;
s3: one of the left sound channel sound box and the right sound channel sound box transmits the obtained frequency response curve signal to the other, the other party compares FRL and FRR, the sensitivity is judged, and the absolute value a of the difference of the sensitivities of the two curves is calculated;
s4: increasing the power amplification gain a of the sound box with low sensitivity to ensure that the sensitivities of the left sound channel sound box and the right sound channel sound box are consistent; taking the example that the sensitivity of FRL is low, all frequency points of FRL are increased by a and changed into FRL + a
S5: calibrating each frequency point on FRL + a and FRR to obtain two correction curves of frequency response curves, if at a certain frequency point, FRR is larger than FRL + a, the corrected value at the frequency point FRL + a is FRR-FRL-a, the corrected value of FRR is 0, if at a certain frequency point, FRR is smaller than FRL + a, the corrected value at the frequency point FRR is FRL + a-FRR, and the corrected value of FRL + a is 0.
And S6, converting the music played by the left sound channel sound box and the right sound channel sound box into two corresponding music frequency response curves, adding the two music frequency response curves and the correction curve for compensation, and converting the compensated music frequency response curves into music signals to be played in the left sound channel sound box and the right sound channel sound box.
The correction principle of S5 is to calibrate each frequency point of the two curves to a higher one, which is suitable for a scene where a user wants a large volume. Or vice versa, calibrating each frequency point of the two curves to a lower one, and being suitable for a scene that a user wants to have low volume.
Because the frequency response curve is greatly influenced by the surrounding environment, such as surrounding walls, tables, chairs and the like, when the user changes the placement positions of the left channel sound box and the right channel sound box, the operation is carried out again according to the method, and the frequency response curves of the left channel sound box and the right channel sound box can be recalibrated.
The invention also provides a sound box which comprises the stereo system, wherein the stereo system comprises a left sound channel sound box and a right sound channel sound box which are the same in shape and size.
The method for automatically calibrating the loudspeaker applied to the stereo system adopts a mode that the left sound channel loudspeaker box and the right sound channel loudspeaker box which can carry out information interaction through the wireless connection device are mutually calibrated, and the loudspeaker of one loudspeaker box is taken as a standard to compensate the loudspeaker of the other loudspeaker box, so that the performance consistency of the loudspeakers of the two sound channels is realized, and a good stereo effect is achieved.
Example 2:
the steps of the method for automatically calibrating a speaker applied to a stereo system in this embodiment are basically the same as those in embodiment 1, wherein the frequency sweep signal is played by a remote controller.
Example 3:
the steps of the method for automatically calibrating a loudspeaker applied to a stereo system in this embodiment are basically the same as those in embodiment 1, wherein the sweep frequency signal is played under control of a mobile phone APP.
In summary, the embodiments of the present invention are merely exemplary and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made according to the content of the claims of the present invention should fall within the technical scope of the present invention.
Claims (10)
1. A method for automatically calibrating a loudspeaker applied to a stereo system is characterized by comprising the following steps: the stereo system comprises a first sound box and a second sound box, wherein the first sound box and the second sound box are respectively provided with a loudspeaker, a microphone and a communication device, the first sound box is set to be a left sound channel sound box, the second sound box is set to be a right sound channel sound box, and the method comprises the following steps:
s1: the left sound channel sound box and the right sound channel sound box play the same sweep frequency signal;
s2: a microphone of the left sound channel sound box receives a frequency sweeping signal played by the right sound channel sound box to obtain a right sound channel frequency response curve FRR, and a microphone of the right sound channel receives a frequency sweeping signal played by the left sound channel sound box to obtain a left sound channel frequency response curve FRL;
s3: one of the left sound channel sound box and the right sound channel sound box transmits the obtained frequency response curve signal to the other, the other party compares FRL and FRR, the sensitivity is judged, and the absolute value a of the difference of the sensitivities of the two curves is calculated;
s4: increasing the power amplification gain a of the sound box with low sensitivity to ensure that the sensitivities of the left sound channel sound box and the right sound channel sound box are consistent;
s5: calibrating the sensitivity of each frequency point on the FRL and the FRR to obtain correction curves of two frequency response curves;
and S6, converting the music played by the left sound channel sound box and the right sound channel sound box into two corresponding music frequency response curves, adding the two music frequency response curves and the correction curve for compensation, and converting the compensated music frequency response curves into music signals to be played in the left sound channel sound box and the right sound channel sound box.
2. The method of claim 1 for auto-calibrating a loudspeaker for use in a stereo system, wherein: calibrating each frequency point on the FRL and the FRR, and calibrating each frequency point on the FRL and the FRR to a frequency response curve with high sensitivity, or calibrating each frequency point on the FRL and the FRR to a frequency response curve with low sensitivity.
3. The method of claim 2 for auto-calibrating a loudspeaker for use in a stereo system, wherein: first, comparing the sensitivity at 1kHz, the absolute value of the difference between the sensitivity of FRR and FRL is a, and taking the example that the sensitivity of FRL is low, all frequency points of FRL are increased by a to become FRL + a. And calibrating each frequency point on the FRL + a and the FRR, if the FRR is larger than the FRL + a at a certain frequency point, the corrected value of the FRL + a at the frequency point is FRR-FRL-a, the corrected value of the FRR is 0, if the FRR is smaller than the FRL + a at a certain frequency point, the corrected value of the FRR at the frequency point is FRL + a-FRR, and the corrected value of the FRL + a is 0.
4. The method of claim 1 for auto-calibrating a loudspeaker for use in a stereo system, wherein: the frequency of the frequency sweeping signal is 50-20000 Hz, and the size of the frequency sweeping signal is 0 dB.
5. The method of claim 1 for auto-calibrating a loudspeaker for use in a stereo system, wherein: the left sound channel sound box and the right sound channel sound box transmit signals through the wireless connection device.
6. The method of claim 5 for auto-calibrating a loudspeaker for use in a stereo system, wherein: the wireless connection device adopts a Bluetooth transmission device.
7. The method of claim 1, wherein: and the sweep frequency signal is played by long pressing a key arranged on the sound box or by a remote controller.
8. The method of claim 1, wherein: and the frequency sweeping signal is controlled to be played through a mobile phone APP.
9. A sound box is characterized in that: comprising a stereo system as claimed in any one of claims 1 to 8.
10. The loudspeaker of claim 9, wherein: the stereo system comprises a left sound channel sound box and a right sound channel sound box which are the same in shape and size.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151044A (en) * | 2020-09-23 | 2020-12-29 | 北京百瑞互联技术有限公司 | Method, device and storage medium for automatically adjusting frequency response curve of Bluetooth playing device in LC3 audio encoder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170339489A1 (en) * | 2012-06-28 | 2017-11-23 | Sonos, Inc. | Hybrid Test Tone for Space-Averaged Room Audio Calibration Using A Moving Microphone |
| US20170373656A1 (en) * | 2015-02-19 | 2017-12-28 | Dolby Laboratories Licensing Corporation | Loudspeaker-room equalization with perceptual correction of spectral dips |
| CN108430003A (en) * | 2018-03-30 | 2018-08-21 | 广东欧珀移动通信有限公司 | Audio compensation method and device, readable storage medium storing program for executing, terminal |
| CN108810717A (en) * | 2018-08-21 | 2018-11-13 | 歌尔科技有限公司 | A kind of left and right acoustic channels degree of balance adjusting method, device, control chip and earphone |
| US20190228785A1 (en) * | 2015-09-25 | 2019-07-25 | Voiceage Corporation | Method and system using a long-term correlation difference between left and right channels for time domain down mixing a stereo sound signal into primary and secondary channels |
-
2019
- 2019-09-30 CN CN201910942481.0A patent/CN110809225B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170339489A1 (en) * | 2012-06-28 | 2017-11-23 | Sonos, Inc. | Hybrid Test Tone for Space-Averaged Room Audio Calibration Using A Moving Microphone |
| US20170373656A1 (en) * | 2015-02-19 | 2017-12-28 | Dolby Laboratories Licensing Corporation | Loudspeaker-room equalization with perceptual correction of spectral dips |
| US20190228785A1 (en) * | 2015-09-25 | 2019-07-25 | Voiceage Corporation | Method and system using a long-term correlation difference between left and right channels for time domain down mixing a stereo sound signal into primary and secondary channels |
| CN108430003A (en) * | 2018-03-30 | 2018-08-21 | 广东欧珀移动通信有限公司 | Audio compensation method and device, readable storage medium storing program for executing, terminal |
| CN108810717A (en) * | 2018-08-21 | 2018-11-13 | 歌尔科技有限公司 | A kind of left and right acoustic channels degree of balance adjusting method, device, control chip and earphone |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151044A (en) * | 2020-09-23 | 2020-12-29 | 北京百瑞互联技术有限公司 | Method, device and storage medium for automatically adjusting frequency response curve of Bluetooth playing device in LC3 audio encoder |
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